Correct the following parenthetical citations.
1. In the book authored by Jones and Carey and Bradley and Simpson (476) no conclusion could be made.
2. Graham (page 47) discussed the importance of getting eight hours of sleep every night.
3. In the book "Best Online Schools" (98) Whitmore School is listed as the top ranked school.
4. The Yellowstone National Park recommends that visitors should not approach or feed the bears (Yellowstone National Park, 12).